Ukuhlolwa Kwamazinga Ekhwalithi kanye Nezindlela Zokuthola I-Sodium Cyanide

I. Izakhiwo Eziyisisekelo Nezicelo Ze-Sodium Cyanide

I-Sodium cyanide (NaCN) iyinto ebalulekile yamakhemikhali angaphili, esetshenziswa kabanzi emikhakheni efana ne-metallurgy, i-electroplating, i-pharmaceuticals, kanye nokuhlanganiswa kwezinto eziphilayo. Umkhiqizo wayo omsulwa usesimweni sezinhlayiya ezimhlophe zekristalu noma i-powder, encibilika kakhulu emanzini futhi inobuthi obunamandla kanye nokubola. Ngenxa yobuthi obuphezulu kakhulu be- Sodium Cyanide , ubuchwepheshe bayo bokulawula ikhwalithi kanye nokuthola buhlobene ngqo nokuphepha kokukhiqiza, ukuvikelwa kwemvelo , kanye nempilo yabantu.

II. I-Quality Standard System ye-Sodium Cyanide

1.Amazinga Kazwelonke (GB)

Izinga Lekhwalithi lamanje le- sodium cyanide eShayina lisekelwe kakhulu ku-"GB/T 19306-2003 Industrial Sodium Cyanide". Leli zinga lichaza izidingo zobuchwepheshe, izindlela zokuhlola, imithetho yokuhlola, kanye nemininingwane yokupakisha, yokugcina, kanye nokuthuthwa kwe- Sodium cyanide yezinga lezimboni . Izinkomba ezithile yilezi ezilandelayo:

Okuqukethwe Okuyinhloko (Kubalwa Njenge-NaCN): ≥ 98.0% (Ibanga Elihle Kakhulu), ≥ 97.0% (Ibanga Lokuqala)

• I-Sodium Hydrooxide (NaOH): ≤ 0.5%

• I-Sodium Carbonate (Na₂CO₃): ≤ 1.0%

• I-Heavy Metals (Ibalwa njenge-Pb): ≤ 0.002%

• I-Insoluble Matter Emanzini: ≤ 0.05%

2.Amazinga Omkhakha kanye Nemininingwane Yamazwe Ngamazwe

• Amazinga emboni embonini ye-metallurgy (njenge-YS/T 53-2020) abeka phambili izidingo eziphakeme zokuhlanzeka nokungcola okuqukethwe kwe-sodium cyanide, ezisebenza ezimeni ezikhethekile ezifana nokukhipha igolide.

• Amazinga omhlaba (afana ne-ISO 14649) agcizelela ukutholwa kobumsulwa kanye nokulandelela ukungcola kwe-sodium cyanide ukuze kuhlangatshezwane nezidingo zokukhiqiza okuphezulu.

III. Izindlela Eziyinhloko Zokuthola I-Sodium Cyanide

1.Izindlela Zokuhlaziya Amakhemikhali

• Indlela yeSilver Nitrate Titration (Indlela Yokulamula):

Sebenzisa ukwakheka kwe-Ag(CN)₂⁻ ezinzile phakathi kwe-Ag⁺ ne-CN⁻. Titrate ngesisombululo esijwayelekile se-nitrate yesiliva bese usebenzisa iodide ye-potassium njengenkomba. Ekugcineni, kwakheka imvula ye-iodide esiliva.

Ifomula yokusabela: AgNO₃ + 2NaCN → Na[Ag(CN)₂] + NaNO₃

• Indlela ye-Acid-Base Titration:

Isetshenziselwa ukunquma okuqukethwe kwe-sodium hydroxide. Sebenzisa i-phenolphthalein njengenkomba kanye ne-titrate enesisombululo esijwayelekile se-hydrochloric acid.

2.Izindlela Zokuhlaziya Instrumental

• I-Ion Chromatography (IC):

Hlukanisa i-CN⁻ ngekholomu yokushintshisana kwe-anion futhi uthole ukutholwa okuzwela kakhulu ngokuhambisana nomtshina we-conductivity, ofanele ukuhlaziywa kwe-trace cyanides.

• I-Spectrophotometry:

Ngokusekelwe ekuphenduleni phakathi kwe-cyanide ne-ejenti ye-chromogenic (efana ne-isonicotinic acid-pyrazolone) ukwakha inhlanganisela eluhlaza okwesibhakabhaka, futhi inqume okuqukethwe ngesilinganiso sokumunca.

• I-Atomic Absorption Spectrometry (AAS):

Thola ukungcola kwensimbi enzima (okufana ne-Pb, Cu) futhi uzuze ukunemba kwezinga le-ppm usebenzisa ubuchwepheshe be-atomization yomlilo noma i-graphite.

3.Ezinye Izinto Zokutholwa

• Ukunqunywa Komswakama: Sebenzisa indlela ye-Karl Fischer noma ukulahlekelwa endleleni yokomisa.

• Ukuhlaziya Usayizi Wezinhlayiyana: Sebenzisa indlela ye-laser diffraction noma indlela yokusefa.

IV. Inqubo Yokuthola kanye Namaphuzu Abalulekile Wokulawula Ikhwalithi

1.Ukuphatha Isampula

• I-sodium cyanide ine-hygroscopic kakhulu. Lapho wenza amasampula, sebenzisa isiqukathi esomile futhi usigcine ngendlela evalekile ukuze ugweme ukonakala okuthinta imiphumela yokutholwa.

• Kumasampula anobuthi obukhulu, ukuhlinza kufanele kwenziwe ku-fume hood, futhi kugqoke izinto zokuzivikela (njengemaski yegesi namagilavu).

2.Iziphazamiso Nezisombululo

• Ukuphazamiseka kwe-Sulfide: Faka i-hydrogen peroxide ukuze ususe ithonya le-S²⁻.

• Indawo Ene-asidi: Ngaphambi kokuthola, lungisa i-pH yesisombululo ibe yizinga le-alkaline (pH > 11) ukuze uvimbele ukuguquguquka kwe-HCN.

3.Izinyathelo Zokulawula Ikhwalithi

• Linganisa amathuluzi (njengama-ion chromatographs namabhalansi) njalo.

• Sebenzisa izinto eziyisethenjwa eziqinisekisiwe (CRM) ukuze kuqinisekiswe ukuphinda kutholwe (kudingeka kube ngu-95% -105%).

• Yenza ukuzimisela okufanayo kwabantu ababili, futhi ukuchezuka komphumela kufanele kube ≤ 0.3%.

V. Ukuvikelwa Kokuphepha kanye Nezidingo Zokuvikela Imvelo

1.Imininingwane Yokusebenza

• Isixazululo se-sodium cyanide kufanele sigcinwe endaweni emnyama ukuze kugwenywe ukubola kwegesi ye-HCN ngenxa yokukhanya.

• Ukuze ukwelapha uketshezi olulahlwayo, engeza inani eleqile le-sodium hypochlorite noma i-hydrogen peroxide ukuze i-oxidize futhi ubolise i-cyanide ekugxiliseni okuphephile (CN⁻ ≤ 0.5 mg/L).

2.Ukuhambisana Nemithethonqubo

• Ngokusho "Nemithetho Yokulawulwa Kokuphepha Kwamakhemikhali Ayingozi" e-China, uhlelo lokuphatha "Okuphindwe kabili Okuhlanu" (iresidi yabantu ababili kanye nokuthunyelwayo, ukugcinwa kwabantu ababili, njll.) kufanele kusetshenziswe ku-sodium cyanide.

• Ilabhorethri yokuthola idinga ukuphasisa isitifiketi se-CMA ukuze kuqinisekiswe ukusebenza okusemthethweni kwedatha.

VI. Amathrendi Okuthuthukisa Ikusasa

1. Ubuchwepheshe Bokuthola Okuzenzakalelayo: Hlanganisa i-spectroscopy eku-inthanethi eseduze ne-infrared (NIR) nokufunda komshini ukuze kufezwe ukuqapha ngesikhathi sangempela inqubo yokukhiqiza.

2. Izindlela Zokuthola Okuluhlaza: Yakha indlela yokuthola usawoti ongenawo i-mercury ukuze unciphise ukungcola kwemvelo.

3. Ubuchwepheshe Bokuhlaziya Ukulandelela: I-Ultra-high performance liquid chromatography-mass spectrometry (UHPLC-MS) isetshenziselwa ukuthola ukungcola kwezinga le-ppb.

Isiphetho

Ukulawulwa kwekhwalithi ye-sodium cyanide kuyisixhumanisi esiyinhloko sokuqinisekisa ukusetshenziswa kwayo okuphephile. Ngezindlela Zokuthola Ezijwayelekile kanye nezinhlelo zokulawula ikhwalithi eziqinile, izingozi zokukhiqiza zingancishiswa ngempumelelo, futhi imboni ingakhuthazwa ukuze ithuthuke ngendlela eluhlaza nehlakaniphile. Esikhathini esizayo, ngobuchwepheshe bokuthola, amazinga ekhwalithi ye-sodium cyanide azothuthukiswa kakhulu, anikeze ukwesekwa okuthembekile kwensimu yokukhiqiza ephezulu.